Passport.js is a suitable authentication middleware for Node.js but becomes unsustainably complex when scaling with enterprise features like SSO and SCIM. WorkOS offers an alternative solution, simplifying user provisioning/deprovisioning and allowing organizations to focus on core product development. The migration process from Passport.js to WorkOS involves eight steps: integrating WorkOS SSO, setting up IdP-initiated SSO for legacy passport-saml connections, and cleaning up by removing passport-saml once all customers are using the WorkOS flow.